| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball shooting passage by which a fraudulent act using a stringed ball can be securely prevented. <P>SOLUTION: The ball shooting passage is for guiding a ball shot toward a game area of a game board, and includes: an outer guide rail set on the game board; an inner guide rail set on the game board side from the outer guide rail; and a ball return prevention valve extended onto the outer guide rail side from the tip end part of the inner guide rail. The end part in the extending direction of the ball return prevention valve is inclined down toward the front of the game board. <P>COPYRIGHT: (C)2012,JPO&INPIT |
